A boy who dreamed of becoming overpowered in another world finally gets his wish and is reincarnated into a fantasy realm. But instead of receiving cheat abilities, he is granted only useless skills. Each time he meets an untimely death, he gains a new skill—yet every single one turns out to be a dud. Through multiple reincarnations, he accumulates nothing but failures. On his fifth reincarnation, however, he finally draws a winning skill. Determined to make this his final life, he vows not to die again and sets out to use his hard‑won ability to carve his own path to glory.

The protagonist, Fai, soon discovers that his previous lives were not wasted. During each incarnation, he encountered and formed bonds with exceptionally powerful individuals from those worlds. As he embarks on this final journey, his former allies—the strongest companions from each different world—reunite with him. Together they face a series of escalating challenges. After resolving a crisis in the empire, Fai achieves his long‑awaited S‑rank adventurer status. His next goal is to obtain the legendary treasure known as the Transcendence Mask, believing it will allow him to become truly overpowered on his own terms. To acquire it, he must compete in a guild tournament that gathers elite SS‑rank adventurers.

The competition takes a dangerous turn when a monstrous entity, born from the fusion of an SS‑rank adventurer's power and Tyco's influence, goes on a rampage. Even the combined might of Fai's reincarnation allies—including Breen and Danchury River—struggles to contain the beast. In the final confrontation, Fai must rely on everything he has learned across his many lives and all the skills he once dismissed as useless. By channeling his accumulated experience and the strength of his companions, he unleashes a decisive attack to end the threat once and for all.